LIZARDS. 



29 



are about 200 species, arranged in some 30 genera, all confined to 

 the Old World. The majority have depressed bodies and are terres- 

 trial ; but some, in which the body is compressed, are arboreal. 



Fig. 29. 



Right half of the Lower Jaw of a Stellion Lizard (a), to exhibit the acrodont 

 dentition, and of an Iguana (b), to show the pleurodont type of dentition. 



Most of the species are insectivorous, but certain kinds of Agama 

 have a mixed diet, and Uromaslix {311, %. 28) and some of its 

 allies feed entirely on fruits and herbs. In the Flying-Dragons 



Fig. 30. 



Australian Frilled Lizard {Chlamydosaurus kingi), with the frill expanded in 

 the "terrifying" attitude. (No. 379-) 



{Draco, 366; fig- 27) the sides of the depressed body carry wing-like 

 membranes supported by expansions of the ribs, by means of which 

 these reptiles pass from bough to bough, although they are incapable 



